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(Color online) Schematic representations of the QUS measurement configuration on (a) transverse plane and (b) frontal plane. For both planes, medial-lateral axis is used as the neutral axis, and the QUS measurement is performed in a 60° angle range, ±30° from the medial-lateral axis. Within the 60° angle scanning range, the interval between every 2 scans is 5°, resulting in 13 scanning angles on each plane of each sample.
